Strip mill



July 3, 192s. 1,676,176 F. C. BIGGERT, JR

STRIP MILL Filed Dec ..16. 1922 1 definitive of .15 to which this. invention relates to my oil time and extra 35 means.

tion,

49 broader. claims.

5.Figi1 'FLOBE NCE 0.31GGERT, J 1%., OF GRAFTON,

NEEBING AN D FOUNDRY COMPANY, EOTIQN F EENNSYLVMIA.

Application filed December The present invention relates broadl to' strip mills and more particularly to mil s of this character having means to' the materialbeing roiled, for maintaining the material at a given temperature,

or for preventing undueradiation of heat therefrom. The term strip is used generically throughout the specification and claims as mills producing greatly elongated articles, as compared with the width or cross section, and may include wires, or the like, 4

It has heretofore been proposed in theart provide means for reheating the material between the roll passes or for heating the same as it is being rolled. The reheating means has frequently been objectionable, due to the loss handling operations required, and the heating by rolling has been accompanied with considerable difiiculty due to the cobbling or looping of the mater al, thereby resulting in damage to the heating By the present invention, the foregoing objections are obviated, and there is provided means for maintaining the desired heat, conserving the initial heat or increasing the temperature of the material being rolled as it passes to successive roll stands.

In the accompanying drawings, there areillustrated more or less diagrammatically certain embodiments of the present invenit being understood that these drawings do not define the limits of the invention, as changes may obviously be made in the construction and operation disclosed, without departing from the spirit or scope of my In the drawings: v Figure 1 is a side elevation, partly is section and partly form of the present invention;

re 2 is a transverse sectional view through the chamber of Figure 1; Figure 2 being on an enlarged scale; and

Figure 3 is a view similar to Flgure 2, but illustrating a modified embodiment of the invention.

, In operating mills of the character to which this invention is particularly adapted, it frequently happens that the material cobbles or loops between the roll stands.

for adding heat rods 7 broken away, illustrating'one PENNSYLVAIQTIA," ASSIGNOR '10 UNITED E1551- OF 1ITTSBURGH, PENNSYLVKA, CGER- STRIP to, we e. Serial n6. comes.

to provide means for heatin while it is being rolled. been madeto provide special driving means for the difierent roll stands, whereby the speed thereof is maintained in such manner as to prevent the existence of slack between the roll asses. The present invention is adapted or use either with mills having special 1 drivin with a milldnven in the'usual manner.

' In Figure 1, there are illustrated the rolls 20f one pass and the rolls 3 of a succeeding pass, these rolls being ada ted to successivel operate upon a strip S 0 suitable materia Arranged between the roll passes and adapted to extend to points adjacent thereto is a mufie'or heating chamber 4, adapted to sub- ,stantially enclose that portion 0 the strip S between the roll passes. As illustrated in Figures 1 and 2,\th1s means may comprise a base 5, supported in any desired manner, as by standards 6, to maintain the same at the proper elevation with relatively movable sldes 7 and a top 8. The sides 7 may be held against accidental displacement by suitable dowels 9, these dowels however, preferably constituting a comparatively loose at with the sockets provided therefor. The cover 8 may be formed of sections or in any other desired manner, but is preferably so mounted as to be easily movable to open This may be accomplished by providing a plvotal mounting 10, for the cover and a counterbalance 11.

With a construction of the character described, it will be apparent that it the strip This tendency makes it somewhat difiocult the aterial ttempts have position. I I

be efiective for openin the cover 8, and it necessary, removing the sides 7.- In this manner, the normal tendency of the strip to. cobble isnot prevented.

InFigure 3, there is illustrated a slightly modified embodiment of the invention, in which figure parts corresponding to parts already described are indicated for sake of conciseness with the same reference charac ters having a prime aflixed thereto. In this construction, the sides 7' are illustrated as being integral with the base 5, although it' will be apparent that the construction in this respect is immaterial. The main difference resides in the form of heating means provided. In the form shown in Figure 2, I

have illustrated asuitable electrical resistance 12, while in the form shown in Figure 3, there may be provided burners 13, for liquid or gaseous fuel.

In operation, if it is merely desired to prevent undue radiation of heat from the material being rolled, additional heat need not be supplied to the enclosing chamber. On the other hand, sufficient heat may be supplied thereto to maintain a given temperature or additional heat may be furnished to increase the temperature of the material as it passes from one stand of rolls to the succeeding stand. 1

The advantages of this invention arise from the provision of a substantially enclosed'chamber which may be easily opened by the material being rolled. Further advantages of the invention arise from the provision of heating means in a chamber of this character whereby any desired temperature conditions ma be maintalned as the material is being ro led.

I claim:

,1. In a continuous mill, material-receivin and heating means between successive rol stands adapted to receive the material being rolled as it leaves one stand and substantially enclose the same while remaining sub stantially out of contact therewith during normal operation, said means having at least one side adapted to be opened b the cobbling of the material bein rolle and being of such dimensions as to reely receive the material and permit the free passage of heat entirely around the same, and means for heating the material durin its passage throu h said heating means, su stantlally as described.

'2. In a mill, anelongated material-receiving means adapted to receive and substantially enclose'the material being rolled, said means having at least' one substantially counter-balanced side adapted to be opened by the cobbling of said material, said side being mounted to normally return to closed position, substantially as described.

3. A heating means for rolling mills comprising an elongated chamber adapted to 5D freely receive and normally remain substantially out of contact with the material being rolled and of such dimensions that the material does not occupysupporting relationship to the walls of the chamber, said chamber having at least one side openable to permaterial beingrolled, at least one substantially counterbalanced side for said chamber to permit movement thereof as the material cobbles, and means for supplying heat to said chamber, substantially as described.

5. In a mill. material receiving means adapted to substantially surround the material being operated upon and having heating means embedded in at least one wall thereof, the material receiving means having a portion adapted to recede outwardly to pre vent injur to the heating means upon movement of t e material.

6. In a mill, material receiving means adapted to substantially surround the material being operated upon and having electric heating means in at least one wall thereof, the material receiving means havin a yiel'dable portlon permitting cobbling o the material therein without injury to the heating means.

7. In a mill, material receiving and heating means adapted to normally substantially surround the material bein operated upon and having a wall thereo? movable away from the material upon transverse movement of the material, such wall being adapted to return to its normal position when not held outwardly.

8. In a mill, material receiving means adapted to normally substantially surround the material being operated upon and having a wall thereof movable away from the material, such movable wall having connected thereto heating means for heating the material.

9. In a mill, material receiving means adapted to normally substantially surround the material being operatedupon and having a wall thereof movable away from the material upon transverse movement of the normal position when not held outwardly.

In-testimony whereof I have hereunto set my hand.

FLORENCE O. BIGGERT, JR. 

